▎ 摘　　要

NOVELTY - A gas sensor (1) comprises graphene layer (2) having a side (3) facing towards the gas environment (GE), an electrode layer comprising electrodes (4a-4d) electrically connected to the graphene layer, and chalcogenide layer (5) covering at least a part of the side of the graphene layer facing towards the gas environment. USE - Gas sensor used for measuring concentration of carbon dioxide in gas environment. ADVANTAGE - The gas sensor has increased selectivity and sensitivity, and is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of gas sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic side view of gas sensor. Gas sensor (1) Graphene layer (2) Side (3) Electrodes (4a-4d) Chalcogenide layer (5) Passivation layer (6) Graphene flock layer (8)